How To Fix MO437 - Too many fields for ALV list

SAP Error Message - Details

• Message type: E = Error

• Message class: MO - Modeling and Prototyping

• Message number: 437

• Message text: Too many fields for ALV list

What causes this issue?

The maximum list width for the standard ALV list is 99 fields. It is
therefore not possible to display this table as a standard ALV list.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Use the ALV grid or the SE16 basic list.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MO437 - Too many fields for ALV list ?

  The SAP error message MO437 "Too many fields for ALV list" typically occurs when you are trying to display an ALV (ABAP List Viewer) report with more fields than the system can handle. This can happen in various scenarios, such as when the number of columns exceeds the limit set by the ALV grid or when the data structure being passed to the ALV is too large.
  Cause:
  
  Exceeding Field Limit: The ALV grid has a limit on the number of fields (columns) that can be displayed. If your report tries to display more fields than this limit, you will encounter this error.
  Data Structure Size: If the data structure being used for the ALV contains too many fields, it can also trigger this error.
  Configuration Issues: Sometimes, the configuration of the ALV or the way the data is being prepared for display can lead to this issue.
  
  Solution:
  
  Reduce the Number of Fields: Review the fields you are trying to display in the ALV report. Remove any unnecessary fields or consider displaying them in a different way (e.g., using selection criteria to limit the data).
  Use Subsets: If you need to display a large number of fields, consider breaking the report into multiple ALV reports or using selection screens to allow users to choose which fields they want to see.
  Check Data Structure: Ensure that the internal table or data structure you are passing to the ALV is not overly complex or large. Simplify it if possible.
  Pagination: If applicable, implement pagination to limit the number of records displayed at one time, which can help manage the number of fields shown.
  ALV Configuration: Review the ALV configuration settings to ensure they are set correctly for your use case.
  
  Related Information:
  
  ALV Field Limit: The specific limit on the number of fields can vary based on the version of SAP and the configuration. Generally, the limit is around 255 fields for an ALV grid.
  ALV Function Modules: Familiarize yourself with the ALV function modules like REUSE_ALV_GRID_DISPLAY or REUSE_ALV_LIST_DISPLAY, as they have parameters that can help manage the display of fields.
  Documentation: Refer to SAP documentation or the SAP Community for best practices on using ALV and handling large datasets.
  
  If you continue to face issues after trying these solutions, consider reaching out to your SAP support team or consulting the SAP Community for more specific guidance based on your implementation.